/*******************************************************
 * Copyright (c) 2014, ArrayFire
 * All rights reserved.
 *
 * This file is distributed under 3-clause BSD license.
 * The complete license agreement can be obtained at:
 * http://arrayfire.com/licenses/BSD-3-Clause
 ********************************************************/

#include <backend.hpp>
#include <bilateral.hpp>
#include <common/err_common.hpp>
#include <handle.hpp>
#include <af/defines.h>
#include <af/dim4.hpp>
#include <af/image.h>

using af::dim4;
using namespace detail;

template<typename inType, typename outType, bool isColor>
static inline af_array bilateral(const af_array &in, const float &sp_sig,
                                 const float &chr_sig) {
    return getHandle(bilateral<inType, outType, isColor>(getArray<inType>(in),
                                                         sp_sig, chr_sig));
}

template<bool isColor>
static af_err bilateral(af_array *out, const af_array &in, const float &s_sigma,
                        const float &c_sigma) {
    try {
        const ArrayInfo &info = getInfo(in);
        af_dtype type         = info.getType();
        af::dim4 dims         = info.dims();

        DIM_ASSERT(1, (dims.ndims() >= 2));

        af_array output;
        switch (type) {
            case f64:
                output =
                    bilateral<double, double, isColor>(in, s_sigma, c_sigma);
                break;
            case f32:
                output = bilateral<float, float, isColor>(in, s_sigma, c_sigma);
                break;
            case b8:
                output = bilateral<char, float, isColor>(in, s_sigma, c_sigma);
                break;
            case s32:
                output = bilateral<int, float, isColor>(in, s_sigma, c_sigma);
                break;
            case u32:
                output = bilateral<uint, float, isColor>(in, s_sigma, c_sigma);
                break;
            case u8:
                output = bilateral<uchar, float, isColor>(in, s_sigma, c_sigma);
                break;
            case s16:
                output = bilateral<short, float, isColor>(in, s_sigma, c_sigma);
                break;
            case u16:
                output =
                    bilateral<ushort, float, isColor>(in, s_sigma, c_sigma);
                break;
            default: TYPE_ERROR(1, type);
        }
        std::swap(*out, output);
    }
    CATCHALL;

    return AF_SUCCESS;
}

af_err af_bilateral(af_array *out, const af_array in, const float spatial_sigma,
                    const float chromatic_sigma, const bool isColor) {
    if (isColor)
        return bilateral<true>(out, in, spatial_sigma, chromatic_sigma);
    else
        return bilateral<false>(out, in, spatial_sigma, chromatic_sigma);
}
